Replace the question mark with an option that follows

A nitrogen fixing blue green algae is

Sprouting of Onion and Potatoes in storage can be avoided by using this as pre-harvesting treatment 

Major source of water used by plants is:

On what basis are algae further categorized into different classes among the given options?

Cyphomandra betacea is the botanical name of which fruit-bearing plant?

Banana is propagated through:

Three types of patents are 

Fluff is the seed produced in:

Chitala chitala is state fish of __

Toxins present in Rape seed and Mustard oil is